Not everybody at Shea last night got on Kaz Matsui’s case for his costly sixth-inning error.

At least his Met teammates stood by the embattled second baseman.

“Yes, I do feel for him,” Carlos Beltran said. “He’s a great guy, he’s a guy who works hard every day. “He really wants to go out, he wants to make every play. Every player goes through situations like that.

“I just hope that he’s strong mentally and he can get out of this.”

Matsui’s botch a Robinson Cano grounder with the bases loaded and one out in the sixth led to the go-ahead Yankee run. It was Matsui’s fifth error of the year.

Manager Willie Randolph indicated that Matsui could’ve been more aggressive on the grounder, but also noted and that it may have skipped. Starting pitcher Victor Zambrano was tagged with the loss.

“This is baseball, we play together, we’ve got to stay together,” Zambrano said. “Whatever happened in the game, we’ve got to just be together.”

Matsui’s defense remains a source of concern.

“You have to turn the page,” Cliff Floyd said. “Short-term memory.

“Those things happen, man. [Matsui] ain’t going to be the only one to make an error at a crucial situation in the game. Turn the page on it, come back tomorrow. Short turnaround. Playing in a couple of hours.”